.page-about {
  --about-dot: 11px;
  --i: 0;
  display: block;
  color: var(--bone);
  padding-bottom: var(--sec);
  overflow-wrap: break-word;
}

.page-about > .about-crumb,
.page-about > .about-head,
.page-about > .about-sec {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.page-about > .about-crumb {
  padding-top: clamp(20px, 4vw, 40px);
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 页头 ---------- */

.page-about .about-head {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  padding-top: clamp(22px, 3.6vw, 44px);
  padding-bottom: clamp(48px, 7vw, 110px);
}

.page-about .about-head__text {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 34em;
}

.page-about .about-head .page-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8.6vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-about .about-head .page-head__lede {
  margin: 0;
  max-width: 30em;
  font-size: clamp(16px, 2.1vw, 18px);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-head .kicker {
  color: var(--cyan);
  letter-spacing: 0.14em;
}

.page-about .about-head__facts {
  display: grid;
  gap: 1px;
  margin-top: 6px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-head__facts .stat {
  background: var(--ink-900);
  padding: 16px 18px;
}

.page-about .about-head__facts .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-head__facts .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-head__media {
  margin: 0;
}

.page-about .about-head__media .media__frame {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-head__media .media__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-head__media .media__caption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-head__text {
    max-width: none;
  }

  .page-about .about-head__facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-head__media .media__frame {
    aspect-ratio: auto;
  }

  .page-about .about-head__media .media__frame img {
    height: auto;
    object-fit: contain;
  }
}

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  padding-top: clamp(52px, 7vw, 118px);
}

.page-about .about-sec .section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .about-sec .section__note {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-sec .section__head {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: var(--gap);
    align-items: end;
  }

  .page-about .about-sec .section__note {
    margin-top: 0;
  }
}

/* ---------- 起点与延续 ---------- */

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(28px, 4vw, 52px);
}

.page-about .about-origin__text p {
  margin: 0 0 1.25em;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--bone);
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
}

.page-about .about-origin__bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  align-content: start;
}

.page-about .about-bar {
  display: grid;
  gap: 8px;
}

.page-about .about-bar__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-bar__track {
  display: block;
  height: 8px;
  background: var(--ink-800);
  border: 1px solid var(--line);
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan));
}

.page-about .about-bar:nth-child(1) .about-bar__fill {
  width: 59%;
}

.page-about .about-bar:nth-child(2) .about-bar__fill {
  width: 100%;
}

.page-about .about-bar__value {
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--amber);
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 里程碑时间轴 ---------- */

.page-about .about-tl__list {
  position: relative;
  margin-top: clamp(30px, 4.6vw, 60px);
}

.page-about .about-tl__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line) 10%, var(--line) 90%, transparent);
}

.page-about .about-tl__group {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl {
  position: relative;
  padding: 24px 0 24px 34px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 0;
  top: 32px;
  width: var(--about-dot);
  height: var(--about-dot);
  background: var(--lime);
  transition: background 260ms ease, box-shadow 260ms ease;
}

.page-about .about-tl__num {
  display: block;
  font-family: var(--font-mono);
  font-size: calc(14px + var(--i) * 1px);
  line-height: 1.3;
  letter-spacing: 0.06em;
  color: var(--cyan);
  transition: color 260ms ease;
}

.page-about .about-tl__body {
  margin-top: 8px;
}

.page-about .about-tl__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--bone);
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-tl__extra {
  margin: 12px 0 0;
  max-width: 32em;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--mist);
  opacity: 0.75;
  transition: color 260ms ease, opacity 260ms ease;
}

.page-about .about-tl:hover .about-tl__dot,
.page-about .about-tl:focus-within .about-tl__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 230, 240, 0.14);
}

.page-about .about-tl:hover .about-tl__num,
.page-about .about-tl:focus-within .about-tl__num {
  color: var(--amber);
}

.page-about .about-tl:hover .about-tl__extra,
.page-about .about-tl:focus-within .about-tl__extra {
  color: var(--bone);
  opacity: 1;
}

.page-about .about-tl:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-tl__media {
  position: relative;
  z-index: 1;
  margin: clamp(20px, 3vw, 36px) 0;
}

.page-about .about-tl__media .media__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-tl__media .media__frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.88;
}

.page-about .about-tl__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-tl__list::before {
    left: 122px;
  }

  .page-about .about-tl {
    display: grid;
    grid-template-columns: 106px minmax(0, 1fr);
    column-gap: 32px;
    padding: 28px 0;
  }

  .page-about .about-tl__num {
    grid-column: 1;
    text-align: right;
    padding-top: 4px;
  }

  .page-about .about-tl__dot {
    left: 117px;
    top: 34px;
  }

  .page-about .about-tl__body {
    grid-column: 2;
    margin-top: 0;
  }

  .page-about .about-tl__media .media__frame img {
    aspect-ratio: 1200 / 400;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-team__intro {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-team__intro p {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--bone);
}

.page-about .about-team__media {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

.page-about .about-team__media .media__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-team__media .media__frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__media .media__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-team__card {
  position: relative;
  padding: 26px 22px 26px 28px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: border-color 260ms ease, background 260ms ease;
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
  transition: background 260ms ease;
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-visible {
  border-color: var(--cyan);
  background: var(--ink-700);
  outline: none;
}

.page-about .about-team__card:hover::before,
.page-about .about-team__card:focus-visible::before {
  background: var(--cyan);
}

.page-about .about-team__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-team__title {
  margin: 12px 0 12px;
  font-size: clamp(18px, 2.2vw, 20px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--bone);
}

.page-about .about-team__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-team__intro {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .about-team__media .media__frame img {
    aspect-ratio: 1400 / 700;
  }
}

@media (min-width: 1000px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-about .about-team__card--a {
    grid-column: 1 / span 6;
  }

  .page-about .about-team__card--b {
    grid-column: 7 / span 6;
    margin-top: 44px;
  }

  .page-about .about-team__card--c {
    grid-column: 3 / span 8;
  }
}

/* ---------- 协作生态 ---------- */

.page-about .about-partner__grid {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partner__item {
  background: var(--ink-900);
  padding: clamp(22px, 3vw, 34px);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-partner__item h3 {
  margin: 16px 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-about .about-partner__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-about .about-partner__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 资质与荣誉 ---------- */

.page-about .about-honor__rail {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0 0 16px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(256px, 78%);
  gap: var(--gap);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--line) transparent;
}

.page-about .about-honor__card {
  scroll-snap-align: start;
  min-height: 208px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: border-color 260ms ease, background 260ms ease;
}

.page-about .about-honor__card:hover,
.page-about .about-honor__card:focus-visible {
  border-color: var(--cyan);
  background: var(--ink-700);
  outline: none;
}

.page-about .about-honor__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-honor__title {
  margin: 16px 0 12px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--bone);
}

.page-about .about-honor__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

@media (max-width: 999px) {
  .page-about .about-honor__rail {
    margin-inline: calc(var(--pad) * -1);
    padding-inline: var(--pad);
  }
}

@media (min-width: 1000px) {
  .page-about .about-honor__rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, 1fr);
    overflow: visible;
    padding-bottom: 0;
  }
}

/* ---------- 服务规模 ---------- */

.page-about .about-scale__stats {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scale__stat {
  background: var(--ink-900);
  padding: 22px 20px;
}

.page-about .about-scale__stat .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--bone);
}

.page-about .about-scale__stat .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-scale__stat:nth-child(2) .stat__value {
  color: var(--amber);
}

.page-about .about-scale__stat:nth-child(4) .stat__value {
  color: var(--cyan);
}

.page-about .about-scale__text {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--bone);
}

.page-about .about-scale__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
}

.page-about .about-scale__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

@media (min-width: 700px) {
  .page-about .about-scale__stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__dot,
  .page-about .about-tl__num,
  .page-about .about-tl__extra,
  .page-about .about-team__card,
  .page-about .about-team__card::before,
  .page-about .about-honor__card {
    transition: none;
  }
}